I used to see this as a soldier. It's an easy modification using paracord.
1. Measure out a piece of paracord as long as your ball chain.
2. Pull out six inner strands leaving one remaining in the mantle.
3. Tie a knot in one end of the single strand.
4. Link the knot into the ball chain clasp.
5. Thread the chain through the mantle by pulling the strand.
6. Melt the ends to prevent fraying.
CurtWG made it!